Abstract

Gravity terrain corrections impose some limitations on the accuracy of gravity surveys. Several numerical techniques have been developed in recent years, which have reduced these errors and at the same time have made the process of gravity data reduction for local and regional studies less tedious.We present here a method to perform gravity terrain corrections with reasonable accuracy. The topography is fitted as a set of Gaussian basis functions, in a manner suitable for implementation in a personal computer. The automated straightforward application of Hammer's chart to this surface has yielded good estimates of terrain corrections, by comparing results from an analytic solution and a field example.

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